Characterization of multiperforated plates manufactured by SLM and EBM for aeroengine applications

Abstract

Additive Manufacturing has shown growing interest in the last years compared to traditional techniques for aeronautical complex shaped parts. In this context, the development of multiperforated plates by additive techniques such as Selective Laser Melting and Electron Beam Melting with respect to conventional substractive technique by laser drilling can be promising for combustion chamber applications. Multiperforated plates have then been manufactured by SLM at ENSAM ParisTech and by EBM at SIMaP to provide efficient cooling system within the chamber. The present work has been focused on the detailed analysis of these different plates, including microstructural characterization and permeability measurements. A special attention was paid to the surface roughness since this parameter might be beneficial for an increasing heat transfer surface, but also might be deleterious for the film cooling stability because of the onset of turbulent regimes.